Configured for non-contacting vibration and displacement measurement in 3300 XL monitoring systems, the Bently Nevada 330104-00-12-10-11-00 (330104 Proximity Probe) provides direct physical signal generation via eddy-current coupling.

Model Configuration Matrix

The 330104-00-12-10-11-00 identifies a specific hardware assembly within the 3300 XL series. The part number parameters denote an 8 mm probe tip diameter, 1.2 meter cable length, 3/8-24 UNF thread pitch, and an unarmored cable construction. This model is engineered for integration with 3300 XL Proximitor sensors, requiring fixed system lengths to ensure electrical impedance matching and signal output linearity.

Hardware Specifications

Eddy-Current Transducer Performance

System accuracy is contingent upon rigorous gap voltage validation. The nominal target gap voltage must be maintained at -10 VDC to ensure the transducer operates within the linear portion of its response curve. Proper rotor dynamics monitoring requires the elimination of target material inconsistencies; calibration is standardized for AISI 4140 steel. To maintain signal integrity, cross-talk suppression must be implemented by adhering to minimum spatial separation guidelines for multi-probe installations, preventing oscillation interference between adjacent eddy-current fields.

Ordering info

• 1x 330104-00-12-10-11-00 Proximity Probe

• 1x Installation documentation

• 1x Probe tip protective cap

• 1x Lock nut and O-ring seal assembly

Field Installation Guidelines

• Mounting Surface: Ensure the mounting hole is drilled and tapped square to the shaft centerline to prevent angular alignment error.

• Thread Engagement: Verify a minimum of 5 full thread engagements for NPT or UNF interfaces to ensure structural stability.

• Torque Limits: Tighten lock nuts to 5.1 N-m (45 in-lb). Avoid excessive force that may cause thread deformation or probe tip damage.

• Shielding: Maintain shield continuity throughout the cable path. Do not ground the cable shield at intermediate junction boxes to avoid ground loops.

• Proximitor Matching: Confirm that the total system length (probe plus extension cable) matches the calibrated length (5 m or 9 m) of the Proximitor sensor.

Frequently Asked Questions

• Can this probe be used in hazardous areas? Yes, it is compatible with intrinsically safe systems when installed per the specific agency-approved control drawings.

• What is the impact of cable length modification? The probe and extension cable are factory-calibrated as a unit; modifying the length alters impedance and invalidates accuracy.

• How is the probe tip protected? The PPS plastic tip is chemically resistant but susceptible to mechanical impact; use provided caps during storage.

• Can the probe measure non-metallic targets? No, the eddy-current principle requires a conductive, metallic target to generate the necessary signal.

• What happens if the gap is too small? If the probe physically contacts the target, the tip may be destroyed and the output signal will be clipped at the power supply rails.

• How is signal drift avoided? Maintain the probe within its specified temperature range and ensure the mounting bracket is free from structural resonance.

• Can I use this with 3300-series Proximitors? No, 3300 XL probes are specifically designed for 3300 XL Proximitor sensors; impedance mismatches will occur with older series.

• Why is the -10 VDC target used? This voltage represents the center of the linear operating range, providing maximum signal headroom for vibration peaks.